work over
1．study or examine thoroughly 仔细检查；钻研
For the term paper I worked over 30 volumes of American history．为了写学期论文，我钻研了30卷美国史书。
I spent some time in working over those statistic figures．我花了一些时间去仔细检查那些统计数字。
2．do again or anew 重新加工；翻新
Every time I work the sum over，I get a different answer．每次我复查这笔帐，得出的数字都不一样。
We are going to work over the old furniture．我们打算翻新旧家具。
3．beat sb．up very roughly （in order to intimidate him or extort payment，etc．）痛打（为了威胁或勒索）
They threatened to work him over until he talked．他们威胁说要打到他开口为止。